Deep Dish Taco Pie

1-1/2 pounds ground beef
1/2 small onion, chopped
1 pkg. taco seasoning mix
8 oz. can tomato sauce
Pillsbury All-Ready Pie Crusts
1 cup crushed corn chips
1-1/2 cups sour cream
1-1/2 cups shredded cheese

Combine first four ingredients. Line the Deep Dish Baker with the pie crust. Place the corn chips over the unbaked pie shell. Place the meat mixture over the chips. Cover with 1-1/2 cups sour cream. Sprinkle with 1-1/2 cups shredded cheese. Sprinkle with more corn chips. bake for 30-35 minutes at 350º. Cut into wedges. Garnish with lettuce, tomatoes, black olives, and taco sauce.